Chapter 1 Sampling scheme

We sampled 4 sites over at least one 24 hr period. We installed 25 ebullition traps across 5 transects in each impoundment. Every 3 hours, we recorded the volume of gas accumulated in each ebullition trap and took a diffusive flux measurement immediately adjacent to 10 if the ebullition traps across the impoundment. To determine impoundment area, I digitized the impoundments using high resolution (0.5 ft) orthoimagery captured during the leaf off period. Pick has a beaver dam on the inlet stream and I delineated only to the beaver dam.

Site Area (km2) Max Depth (m) Mean Depth (m) Residence Time Dates Sampled
Deans 0.0041 3.52 2.03 8/16/22 - 8/17/22
8/30/22 - 8/31/22
Sister 3 0.0012 2.27 1.25 8/22/22 - 8/23/22
Catfish 0.0018 1.98 0.80 9/6/22 - 9/7/22
9/18/22 - 9/19/22
Pick 0.0077 3.80 1.58 8/22/22 - 8/23/22

1.1 Dissolved oxygen

We recorded dissolved oxygen every 15 minutes 0.25 m below the surface in every impoundment. From 6/20/22 to 7/13/22, we also recorded dissolved oxygen 0.1m from the bottom of Pick in the deepest location in the impoundment. Because dissolved oxygen was consistently 0 mg/L, we reallocated our oxygen sensors and installed both a top and bottom DO sensor in Sister 3.

1.1.1 Deans

1.1.2 Catfish

1.1.3 Sister 3

1.1.4 Pick

1.1.5 All impoundments top DO

1.2 Temperature

1.2.1 Deans

1.2.2 Catfish

1.2.3 Sister 3

1.2.4 Pick